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