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)(11,12)(13,15)(14,16)(17,18)(19,27)(20,25)(21,30)(22,24)(23,28)(26,31)(29,32)(1,3,5,8)(2,6,4,7)(9,11)(10,14)(12,15)(13,16)(17,19)(18,23)(20,21)(22,28)(24,27)(25,26)(29,31)(30,32)(1,2,5,4)(3,6,8,7)(10,15)(12,14)(18,24)(19,28)(20,29)(26,30)(9,12,13,14)(10,11,15,16)(17,20)(18,25)(19,21)(22,29)(23,26)(24,32)(27,30)(28,31)(9,11)(10,14)(12,15)(13,16)(17,21)(18,26)(19,29)(20,28)(22,31)(23,32)(24,30)(25,27) involution — undirected(1,4,5,2)(3,7,8,6)(17,18)(19,23)(20,25)(21,26)(22,24)(27,28)(29,32)(30,31)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.