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