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