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