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