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