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