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