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