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