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