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