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