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