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