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