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