One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,14)(6,10)(9,15)(11,12)(13,16)(18,22)(19,25)(20,27)(31,32)(33,34)(35,38)(36,44)(37,41)(39,43)(40,46)(42,48)(45,47) involution — undirected(1,3)(2,7)(4,5)(6,11)(8,14)(9,16)(10,12)(13,15)(17,18,21,22)(19,23,25,30)(20,28,27,24)(26,32,29,31)(33,35,37,43)(34,38,41,39)(36,45,46,42)(40,48,44,47)(3,11)(4,13)(7,12)(8,16)(17,19,21,25)(18,23,22,30)(20,26,27,29)(24,31,28,32)(33,35)(34,39)(36,42)(37,43)(38,41)(40,48)(44,47)(45,46)(1,4,6,13)(2,8,10,16)(3,5,11,15)(7,14,12,9)(17,19)(18,23)(20,29)(21,25)(22,30)(24,32)(26,27)(28,31)(33,34)(35,38)(36,40)(37,41)(39,43)(42,47)(44,46)(45,48)(1,5)(2,9)(3,4)(6,15)(7,16)(8,12)(10,14)(11,13)(17,20)(18,24)(19,26)(21,27)(22,28)(23,31)(25,29)(30,32)(33,35)(34,39)(36,42)(37,43)(38,41)(40,48)(44,47)(45,46) involution — undirected(1,2)(3,12)(4,8)(5,9)(6,10)(7,11)(13,16)(14,15)(17,18)(19,23)(20,24)(21,22)(25,30)(26,31)(27,28)(29,32)(33,36,37,46)(34,40,41,44)(35,42,43,45)(38,47,39,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.