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