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