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