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