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