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