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