One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,10,6,8,4,9)(3,11,12,16,13,7,14,15)(17,18,22,28,23,29,38,45,24,30,36,43,20,26,21,27)(19,31,34,42,32,44,33,46,35,47,37,25,39,41,48,40)(1,3)(2,7)(4,12)(5,14)(6,13)(8,11)(9,15)(10,16)(17,19)(18,25)(20,32)(21,37)(22,33)(23,39)(24,35)(26,40)(27,44)(28,31)(29,46)(30,42)(34,38)(36,48)(41,45)(43,47) involution — undirected(2,8)(7,11)(9,10)(15,16)(17,20,24,23)(18,26,30,29)(19,32,35,39)(21,36,38,22)(25,40,42,46)(27,43,45,28)(31,44,47,41)(33,37,48,34)(1,4,6,5)(2,9,8,10)(3,12,13,14)(7,15,11,16)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.