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