One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6,9,14,12,7,11,16)(8,19,21,31,24,34,23,35)(10,26,25,18,29,32,28,15)(13,27,30,22,17,33,20,36)(1,2)(3,4)(5,7)(6,12)(8,20)(9,14)(10,15)(11,16)(13,23)(17,21)(18,29)(19,33)(22,31)(24,30)(25,32)(26,28)(27,34)(35,36) involution — undirected(1,3,4,2)(5,8)(6,13,7,17)(9,23)(10,27)(11,21)(12,24)(14,20,16,30)(15,31,18,35)(19,32,34,26)(22,28)(25,36)(29,33)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.