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