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