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