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