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