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