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