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