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)(22,28)(25,30)(27,32)(29,31)(1,3,5,10,6,2,7,9)(4,11,13,16,14,8,15,12)(17,19,20,28)(18,22,24,26)(21,27,30,29)(23,31,25,32)(1,2)(3,6)(4,11)(5,9)(7,10)(8,14)(12,15)(13,16)(18,23)(19,27)(21,30)(24,25)(28,29)(31,32) involution — undirected(1,4,5,13,6,14,7,15)(2,8,9,12,3,11,10,16)(18,24)(22,26)(23,25)(31,32)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.