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