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