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