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