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