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