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