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