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)(11,15)(12,14)(13,16)(17,18,21,25,22,26,35,41)(19,27,29,37,30,40,34,23)(20,31,33,47,32,24,38,39)(28,43,45,36,44,42,48,46)(2,5)(3,7)(9,11,12,16)(10,13,14,15)(11,16)(13,15)(17,19,22,30)(18,23,26,37)(20,28,32,44)(21,34,35,29)(24,36,31,46)(25,40,41,27)(33,48,38,45)(39,43,47,42)(2,5)(6,8)(10,14)(13,15)(17,20)(18,24)(19,28)(21,33)(22,32)(23,36)(25,39)(26,31)(27,42)(29,45)(30,44)(34,48)(35,38)(37,46)(40,43)(41,47) involution — undirected(1,3,4,7)(2,6,5,8)(20,32)(24,31)(28,44)(33,38)(36,46)(39,47)(42,43)(45,48)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.