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)(11,12)(13,16)(14,15)(17,18)(19,28)(20,25)(21,26)(22,24)(23,29)(27,30)(31,32)(1,3)(2,6)(4,7)(5,8)(9,11)(10,14)(12,16)(13,15)(17,19,21,29)(18,23,26,28)(20,22,31,30)(24,25,27,32)(1,4,5,2)(3,7,8,6)(9,12,13,14)(10,15,16,11)(18,24)(19,29)(22,30)(23,32)(25,28)(26,27)(3,8)(6,7)(11,15)(12,14)(17,20,21,31)(18,25,26,32)(19,30,29,22)(23,24,28,27)(10,16)(11,15)(18,26)(19,29)(20,31)(24,27) 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.