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