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