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