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