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