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