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