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