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