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