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