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