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)(17,18,24,30,23,28,22,29)(19,31,34,25,26,20,33,40)(21,27,41,45,38,46,39,44)(32,37,47,42,43,35,36,48)(3,9)(4,12)(6,13)(7,11)(17,19)(18,25)(20,29)(21,36)(22,34)(23,26)(24,33)(27,37)(28,40)(30,31)(32,39)(35,46)(38,47)(41,43)(42,44)(45,48) involution — undirected(1,3,5,9)(2,6,8,13)(4,10,12,15)(7,14,11,16)(17,20,24,40,23,31,22,25)(18,26,29,34,28,19,30,33)(21,37,41,42,38,35,39,48)(27,32,44,36,46,43,45,47)(3,9)(6,13)(10,15)(14,16)(17,21,22,39,23,38,24,41)(18,27,29,44,28,46,30,45)(19,32,33,36,26,43,34,47)(20,35,25,42,31,37,40,48)(1,4,5,12)(2,7,8,11)(3,10,9,15)(6,14,13,16)(18,28)(19,26)(21,38)(29,30)(33,34)(35,37)(39,41)(42,48)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.