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