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