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