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