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