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