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