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