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