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