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