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