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