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