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