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