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