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