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