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