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