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