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