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