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