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