One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,9)(5,12)(6,7)(10,15)(11,14)(13,16)(20,28)(24,29)(26,32)(30,31)(33,34)(35,41)(36,40)(37,45)(38,48)(39,42)(43,46)(44,47) involution — undirected(3,11)(4,13)(8,14)(9,16)(17,18)(19,25)(20,24)(21,22)(23,27)(26,31)(28,29)(30,32)(33,35,39,45)(34,37,42,41)(36,43,38,44)(40,47,48,46)(2,7)(3,11)(9,16)(10,12)(18,22)(23,25)(24,29)(30,31)(33,36,39,38)(34,40,42,48)(35,43,45,44)(37,47,41,46)(1,3)(2,8)(4,12)(5,9)(6,11)(7,14)(10,13)(15,16)(17,18)(19,23)(20,24)(21,22)(25,27)(26,30)(28,29)(31,32)(33,37,39,41)(34,35,42,45)(36,46,38,47)(40,44,48,43)(1,4,6,13)(2,9,7,16)(3,12,11,10)(5,14,15,8)(17,19)(18,23)(20,26)(21,27)(22,25)(24,30)(28,32)(29,31)(33,35)(34,41)(36,43)(37,42)(38,44)(39,45)(40,46)(47,48)(1,5)(2,10)(3,9)(4,14)(6,15)(7,12)(8,13)(11,16)(17,20)(18,24)(19,26)(21,28)(22,29)(23,30)(25,31)(27,32)(33,38,39,36)(34,40,42,48)(35,44,45,43)(37,47,41,46)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.