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