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