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