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