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