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