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