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