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