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