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