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