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