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