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