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