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