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