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