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