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