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