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