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