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