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