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