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