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