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