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