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