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