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