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