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