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