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