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