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