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