One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,7)(3,4,8,6)(10,13)(11,15)(18,22)(20,24)(25,26,28,31)(27,30,32,29)(1,3,5,8)(2,6,7,4)(9,10)(11,14)(12,13)(15,16)(17,18,21,22)(19,20,23,24)(25,27)(26,29)(28,32)(30,31)(2,7)(4,6)(10,13)(14,16)(18,22)(20,24)(25,27)(26,30)(28,32)(29,31) involution — undirected(1,3)(2,4)(5,8)(6,7)(9,11,12,15)(10,14,13,16)(17,19,21,23)(18,20,22,24)(1,4)(2,3)(5,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,20)(18,23)(19,22)(21,24)(25,26)(27,29)(28,31)(30,32) involution — undirectedA 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.