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