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