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