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