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