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