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