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