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