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