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