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