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