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