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