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)(17,18,23,28)(19,24,33,42)(20,34,36,26)(21,27,22,38)(25,37,43,35)(29,40,30,44)(31,41,32,47)(39,46,48,45)(1,3,6,2)(4,8,5,7)(9,10)(11,16)(12,13)(14,15)(17,19)(18,24)(20,29)(21,31)(22,32)(23,33)(25,39)(26,44)(27,41)(28,42)(30,36)(34,40)(35,45)(37,46)(38,47)(43,48)(1,4,6,5)(2,7,3,8)(10,13)(14,16)(17,20)(18,25)(19,29)(21,35)(22,37)(23,36)(24,39)(26,27)(28,43)(30,33)(31,45)(32,46)(34,38)(40,47)(41,44)(42,48)(1,4,6,5)(2,8,3,7)(9,11,12,15)(10,14,13,16)(17,20)(18,26)(19,30)(21,37)(22,35)(23,36)(24,40)(25,27)(28,34)(29,33)(31,45)(32,46)(38,43)(39,47)(41,48)(42,44)(1,5,6,4)(2,8,3,7)(10,13)(14,16)(17,21,23,22)(18,27,28,38)(19,31,33,32)(20,35,36,37)(24,41,42,47)(25,26,43,34)(29,45,30,46)(39,44,48,40)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.