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