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