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