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