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