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