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