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