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