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